For Soldado to thrive, I believe the side needs one of two types of players (or one of each if you want to challenge for the title) You need a player like Modric, who has the vision to play the pass that is needed to cut open the defense, playing it to the players on the wing who then have the time and space to cross the ball to said Soldado. Or/And you need a player like Bale, who takes the ball at his feet past the players and can either strike or pass to the waiting Soldado to tap the ball home. We have neither of these kinds of players so our build up is slow, non-pentrating, thoughtless and low in quality.
Soldado is not the problem here. If we are not able to create a team that consists of one or both of these types of players then we either need to change our style of football and replace Soldado with a striker that is able to come deep, collect the ball and then pull off a solo miracle mission. Or we except that the standard we are at is as high as we can get. 5th/6th place every year.